<li class="list-group-item">
  <div>
    <div class="box-side">
      <a href="#" target="_blank">
        <img src=""/>
      </a> <!-- 用户头像和链接 -->
    </div>
    <div class="box-main">
      <div class="doc-meta"></div>
      <div class="doc-preview">#回复内容#</div>
    </div>
  </div>
</li>